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//===-- NVPTXISelLowering.h - NVPTX DAG Lowering Interface ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the interfaces that NVPTX uses to lower LLVM code into a
// selection DAG.
//
//===----------------------------------------------------------------------===//
#ifndef NVPTXISELLOWERING_H
#define NVPTXISELLOWERING_H
#include "NVPTX.h"
#include "NVPTXSubtarget.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/Target/TargetLowering.h"
namespace llvm {
namespace NVPTXISD {
enum NodeType {
// Start the numbering from where ISD NodeType finishes.
FIRST_NUMBER = ISD::BUILTIN_OP_END,
Wrapper,
CALL,
RET_FLAG,
LOAD_PARAM,
NVBuiltin,
DeclareParam,
DeclareScalarParam,
DeclareRetParam,
DeclareRet,
DeclareScalarRet,
PrintCall,
PrintCallUni,
CallArgBegin,
CallArg,
LastCallArg,
CallArgEnd,
CallVoid,
CallVal,
CallSymbol,
Prototype,
MoveParam,
PseudoUseParam,
RETURN,
CallSeqBegin,
CallSeqEnd,
Dummy,
LoadV2 = ISD::FIRST_TARGET_MEMORY_OPCODE,
LoadV4,
LDGV2, // LDG.v2
LDGV4, // LDG.v4
LDUV2, // LDU.v2
LDUV4, // LDU.v4
StoreV2,
StoreV4,
LoadParam,
LoadParamV2,
LoadParamV4,
StoreParam,
StoreParamV2,
StoreParamV4,
StoreParamS32, // to sext and store a <32bit value, not used currently
StoreParamU32, // to zext and store a <32bit value, not used currently
StoreRetval,
StoreRetvalV2,
StoreRetvalV4
};
}
//===--------------------------------------------------------------------===//
// TargetLowering Implementation
//===--------------------------------------------------------------------===//
class NVPTXTargetLowering : public TargetLowering {
public:
explicit NVPTXTargetLowering(NVPTXTargetMachine &TM);
virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerGlobalAddress(const GlobalValue *GV, int64_t Offset,
SelectionDAG &DAG) const;
virtual const char *getTargetNodeName(unsigned Opcode) const;
bool isTypeSupportedInIntrinsic(MVT VT) const;
bool getTgtMemIntrinsic(IntrinsicInfo &Info, const CallInst &I,
unsigned Intrinsic) const;
/// isLegalAddressingMode - Return true if the addressing mode represented
/// by AM is legal for this target, for a load/store of the specified type
/// Used to guide target specific optimizations, like loop strength
/// reduction (LoopStrengthReduce.cpp) and memory optimization for
/// address mode (CodeGenPrepare.cpp)
virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const;
/// getFunctionAlignment - Return the Log2 alignment of this function.
virtual unsigned getFunctionAlignment(const Function *F) const;
virtual EVT getSetCCResultType(LLVMContext &, EVT VT) const {
if (VT.isVector())
return MVT::getVectorVT(MVT::i1, VT.getVectorNumElements());
return MVT::i1;
}
ConstraintType getConstraintType(const std::string &Constraint) const;
std::pair<unsigned, const TargetRegisterClass *>
getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const;
virtual SDValue LowerFormalArguments(
SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::InputArg> &Ins, SDLoc dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const;
virtual SDValue
LowerCall(CallLoweringInfo &CLI, SmallVectorImpl<SDValue> &InVals) const;
std::string getPrototype(Type *, const ArgListTy &,
const SmallVectorImpl<ISD::OutputArg> &,
unsigned retAlignment,
const ImmutableCallSite *CS) const;
virtual SDValue
LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals, SDLoc dl,
SelectionDAG &DAG) const;
virtual void LowerAsmOperandForConstraint(SDValue Op, std::string &Constraint,
std::vector<SDValue> &Ops,
SelectionDAG &DAG) const;
NVPTXTargetMachine *nvTM;
// PTX always uses 32-bit shift amounts
virtual MVT getScalarShiftAmountTy(EVT LHSTy) const { return MVT::i32; }
virtual bool shouldSplitVectorElementType(EVT VT) const;
private:
const NVPTXSubtarget &nvptxSubtarget; // cache the subtarget here
SDValue getExtSymb(SelectionDAG &DAG, const char *name, int idx,
EVT = MVT::i32) const;
SDValue getParamSymbol(SelectionDAG &DAG, int idx, EVT) const;
SDValue getParamHelpSymbol(SelectionDAG &DAG, int idx);
SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerLOADi1(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSTOREi1(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSTOREVector(SDValue Op, SelectionDAG &DAG) const;
virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG) const;
unsigned getArgumentAlignment(SDValue Callee, const ImmutableCallSite *CS,
Type *Ty, unsigned Idx) const;
};
} // namespace llvm
#endif // NVPTXISELLOWERING_H
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